Vania



C. L. PEIRCE, JR.

INSULATOR SUPPORT.

APPLICATION mu) FEB. 5. 1916,

1,1 95,263. Patented Aug. 22, 1916.

- INVENTQR. M m BY 1 W W I ATTORNEYS.

UNITED STATES PATENT OFFICE.

CHARLES L. PEIRCE, JR OF PITTSBURGH, PENNSYLVANIA, ASSIG-NOR OF ONE-HALF TO HUBBARD & 00., OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

INSULATOR-SUPPOR'I.

Specification of Letters Patent.

Patented Au 22, 1916.

Application filed February 5, 1916. Serial No. 76,304.

To all whom it may concern:

Be it known that 1, CHARLES L. PEIRCE, Jr., a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvemerits in Insulator-Supports, of which the following is a specification.

My invention relates to insulator supports and contemplates improved construction which will make such supports more practical and more eflicient.

The prior art discloses insulator supports in which thimble structures of thin sheet metal are secured to bracket members of heavier metal, the purpose of the thin sheet metal thimble structures being to give a resilient seat to insulators. In other structures the bracket members are of heavy metal and the thimble structure is integral therewith. The supports having the thin sheet metal thimble structures secured thereto are adapted only for comparatively light service, and the supports in which the thimble structures are integral with the bracket part are particularly adapted for heavy service and considerable yield and elasticity of the thimble structure is sacrificed in behalf of strength.

One of the important objects of my invention is to produce a support which posscsses great strength yet which is yielding at the thimble structure and which is particularly adapted for intermediate service, that is, service where a thin sheet metal structure would be too weak and where the integral thimble construction would be too unyielding. I

In some of the prior supports in which an all sheet metal thimble structure is applied to a bracket member, the bracket member is bent up from stock material, such as channel bar. However, with such construction it is necessary to flatten and bend the thimble structure in order that it may be secured to the bracket member and such bending of course destroys the circular cross-section at the lower end of the thimble structure and correspondingly reduces the strength.

Another object of my invention is therefore to produce an insulator support which will provide a seat of circular cross-section for the insulator structure so that circular cross-section throughout the insulator receiving end of the support may be retained.

I obtain the above desirable features by bending up a properly dimensioned flat piece of sheet metal to form to get the necessary strength at the various sections and by having one end of the bracket member formed and threaded to form part of a thimble structure, the remaining part of the thimble structure being formed up from thinner sheet metal and secured to the bracket member in such manner that the insulator receiving end of the support is of circular cross-section throughout and yieldlng.

My improved construction is embodied in the structures shown on the accompanying drawing in which Figure 1 is a side elevational view, Fig. 2 is a front elevational view, Fig. 3 is a sectional view on plane 33, Fig. 2, Fig. 4 is a sectional. view on plane 4l"l-, Fig. 1, and Fig. 5 is a front elevational view of the thimble end of the support showing a modified arrangement.

The bracket member 13 shown is bent up from a single piece of sheet metal to be of arched or U-shaped cross-section, the bracket member being open outwardly, that is, the limbs 10 and 11 extending outwardly and being separated to be parallel with each other or at an angle. Near the outer end of the bracket member the limbs 10 and 11 are brought together to form the base part c of circular cross-section. Part of the bracket end is continued beyond this base section to form the part 12 of the thimble structure. In Figs. 1 to at, this part is semicylindrical and has the threads 13 thereon for insulators. The end 12 thus forms one half of the thimble structure, and the other half 1- of the thimble structure is formed entire from a piece of sheet metal which is of smaller gage than the metal of the bracket B. This part 14 is semi-cylindrical and intimately engages at its lower end with the cylindrical base section 0 and is secured thereto as by a rivet 15 extending through the base section. The upper portion of the thimble part 14 has threads 16 which register with the threads 12 to form the thrcade l seat for insulators. in order to make the thimble structure yielding the edges of the parts 12 and 14s are separated by a gap 1?, this permitting radial yield of the parts. particularly the thinner part l-l, when an insulator is applied, and after application ol. an insulator the outward springing tendency of the parts will lock the insulator to the support. The thimble receiving end of the described support is of circular crosssection throughout and maximum strength is obtained where it is mostly needed.

In Figs. 1 to l, the thimble structure comprises two parts separated by gaps 17. If greater resiliency or yield is desired either one or both of these parts could be subdivided.

In Fig. 5 I have shown an arrangement in which the integral part of the thimble structure is sub-divided by av gap 18 into two sections a. and 7), and the attached thimble structure which is subdivided by gap 19 into the sections 0 and (Z. The subdivision could be carried further if desired.

In the drawing I have shown the integral part 12 of the thimble structure on the inside of the bracket end, and the attachable thimble part Llat the outside. This is probably the preferred arrangement as the strong integral part 12 will take up the side strains which are usually in direction away from the wall or pole to which the insulator support is secured. It is evident, however, that the position of the integral part could be changed and that it could, for example, be at the sides of the bracket member. Other modifications might also be possible which would still come within the scope of the invention, and I do not therefore desire to be limited to precisely what has been shown.

I claim as follows:

1. An insulator support comprising a bracket member formed up entire from a single piece of sheet metal, the end of said bracket member being threaded to form one side of a thimble structure, the remainder of said thimble structure being formed up integral from a piece of sheet metal and secured to the bracket member.

2. An insulator support comprising a bracket member and a thimble structure, said thimble structure being of circular cross-section throughout, part of said thimble structure being integral with the bracket member and the other part being a separate piece and secured to the bracket member.

9. ln an insulator support, a bracket member jlormed up entire from a single piece of comparatively heavy sheet metal, the end oi? said bracket member being of arcuatc cross-section and threaded to form part of the thimble structure, said bracket member below said threaded end being of circular moss-section, and a thimble part formed entire from a single piece of thinner she t metal secured to said bracket member at its circular cross-section and forming with the threaded bracket end. a thimble structure oi? circular cross-section throughout.

-;l. l n an insulator support, a bracket member irormed up entire from a single piece o'li taimparatively heavy sheet metal, the end of said bracket member being of arcuate crosssection and threaded to form part of the thimble structure, said bracket member below said threaded end being of circular cross-section, and a thimble part formed entire from a single piece of thinner sheet metal secured to said bracket member at its circular cross-section and forming with the threaded bracket end a thimble structure of circular cross-section throughout, the longitudinal ed of said thimble structure parts being SQPZIi'flliQtl a distance to permit radial yield of the structure when an insulator is applied.

An insulator support comprising a bracket member and a thimble structure, said brac"et member being formed up entire from a single piece of comparatively heavy sheet metal and be ig of arch shaped cross-section, the end oi said bracket memher being of arcuate cross-section and threaded to form part of the thimble structure, the setion of the bracket member below said threaded end being of circular cross-section to form a cylindrical seat, and a thimble structure part formed. up entire from comparatively thin sheet metal and secured to said seat to form with said bracket member threaded end the complete thimble structure of circular crosssection throughout.

(3. in insulator support comprising a bracket member and a thimble structure, part of said thimble structure being inte gral with the bracket member and the remainder being a separate piece secured to the bracket member, said thimble parts being sub-divided longitudinally in order to yield when an insulator is applied.

7. An insulator support comprising a U- shaped bracket member formed up entire from a single piece of comparatively heavy sheet metal and being of arch shaped crosssection, means at the inner end of the bracke for securing it to a support, the end section of the bracket member being cut out and brought together to term a base part of cir cular cross-section and an end of semi-circular cross-section, receiving threads on said threads thereon for cooperating with the plied, said bracket member seating end rethreads of the bracket member end to form si sting the pull strains on the insulator. the complete threaded seat for insulators, In Witness whereof I hereunto subscribe 10 the edges of said outer seating member bemy name this 1st day of February, A. D.

5 ing separated from those of the other mem- 1916.

ber for permitting relative movement between the parts when an insulator is ap- CHARLES L. PEIRCE, JR.

Copies of this patent may be obtained tor five cents each, by addressing the Commissioner of Patents,

. Washington, I). C. 

